Mai Tobita was one of the first female friends of Emi Sendou. She attends Miyaji Academy with Emi and is also interested (in a varying degree) in Vanguard. She seemingly has a shy yet sweet personality and is usually seen dressed in either her Miyaji Academy uniform or her usual attire of a yellow dress shirt and pink skirt. She was one of the first seen using the new Neo Nectar clan in her main deck in Episode 51: Golden Glow. In Season 3 Mai has been shown using a Bermuda Triangle deck.
In Season 3, she changed her deck to Bermuda Triangle focusing on Soul-Building methods in order to utilize Eternal Idol Pacifica's Limit Break to the fullest in tandem with the new Bermuda Triangle PR♥ISM units.